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Finding the Fourth Proportional to 1,009,959, 1,393,772.60 and 557,279.16

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Solution

The fourth proportional to 1,009,959, 1,393,772.60 and 557,279.16 is: 769,061.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,009,959 : 1,393,772.60 = 557,279.16 : x
  2. Step 2: Convert to fraction form
    1,009,959/1,393,772.60 = 557,279.16/x
  3. Step 3: Cross multiply
    1,009,959x = 1,393,772.60 × 557,279.16
  4. Step 4: Simplify right side
    1,009,959x = 776,720,423,759.02
  5. Step 5: Solve for x
    x = 776,720,423,759.02/1,009,959
  6. Step 6: Final answer
    x = 769,061.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.